Armature for multipolar dynamos.



Patented Sept. I8, I900.

J. J. W000. ARMATURE FOB MULT'IPOLAR DYNAMOS.

(Application filed June 14, 1898.)

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INVENTOR W020 WITNESSES 1 W604, By his Azzomeys,

Patented Sept. l8, I900.

J. J. WOOD.

ABMATURE FOR MULTIPULAR DYNAMOS.

(Application filed June 14, 18984) 3 Sheets-Sheet 2,

(No Model.)

INVENTOR: By his {425 1163 3. W .mag g WVIZNESSESI MM No. 658,!00. Patented Sept..l8, I900. J. J. WOOD. ABMATUBE FOB MULTIPOLAB DYNAMOS.

(Application filed. June 14, 1898;)

(No Model.) 3 Sheets8heet 3.

I FIG. 4.

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WITNESSES: INVENTOR:

W 45 1 By his Afzorneys,

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UNITED STATES PATENT OFFICE.

JAMES J. WOOD, OF FORT WAYNE, INDIANA, ASSIGNOR TO THE GENERAL ELECTRIC COMPANY, OF NEW YORK.

ARMATURE FOR MULTIPOLAR DYNAMOS.

SPECIFICATION forming part of Letters Patent No. 658,100, dated September 18, 1900.

Application filed June 14,1898. $eria1N0. 683,406. (No model.)

To aZZ whom it may concern: slotted to receive the winding in the manner Be it known that 1, JAMES J. WOOD, a citicommon to iron-clad armatures. The armazen of the United States, residing at Fort ture-winding is letteredD and is of the usual WVayne, in the county of Allen and State of type, one side of each coil being carried 5 Indiana, have invented certain new and usethrough the inner half of a core-slot,while the ful Improvements in Armatures for Multiopposite half thereof passes through the outer polar Dynamos, of which the following is a half of another core-slot removed from the specification. first a distance depending upon the number This invention provides improved means of poles in the multipolar field-magnet, so 10 for ventilating armatures for m ultipolar dythat one side of the coil will be passing through namo-electric machines in order to prevent a positive field while the other side is passing overheating of the coils. To this end I prothrougha negative field,as is wellunderstood. vide ventilating-spaces between the coils and The intermediate or end portions of the coils core and the spiders, so that currents of air are carried beyond the ends of the core sufli- :5 may enter inside the core and circulate ciently far to accommodate their oblique por through air-ducts against the core and around tions, these outlying portions of the winding the coils. being supported by flanges E E onthe respec- Figure 1 of the accompanying drawings is tive spiders. The flangeEon spiderAis cylina vertical diametrical section of an armature drical, the commutator connections being 20 and commutator embodying my invention. madewith the coils at its outer edge, as in- Fig. 2 is a half end elevation of the left-hand dicated. The flange E is turned outwardly spider in Fig. lviewed from the commutator at its outer side, as shown at E to protect end. Fig. 3 is a sectional elevation viewed the bends of the winding. from the left in Fig. 1, the upper left-hand According to myinventionIprovideagainst 25 quarter being an elevation, the upper rightoverheating of the core and winding by means hand quarter a section on the line 3 in Fig. of ventilating spaces or ducts, through whiclr 1, the lower right-hand quarter a section on currents of air may flow. The core punchthe line 3 and the lower left-hand quarter .ings or laminae may be separated at intervals a section on the line 3. Fig. 4: is a fragto form ventilating-spaces or air-ducts ff, 8c 0 mentary section, being an enlargement of through which air may circulate to cool the the upper part of Fig. 1, showing one of the core. At opposite ends of the core the end ventilating-gaps in the core. Fig. 5 is an plates or rings of the spiders are spaced mainly enlarged plan of part of the periphery of the apart from the core by the provision of ribs armature, showingone of the ventilatingaps g g thereon, which ribs extend radially and 8 5 with part of the winding omitted. Fig. 6 is support the end laminae of the core at frea fragment of the core-punching at a ventiquent intervals, leaving between them ventilating-gap, showing the twisting of its teeth. lating-spaces or air-ducts h h for circulation Fig. 7 shows one of the spacing-pieces reof currents of air. These ribs extend not moved. only along the faces which are against the 40 In the particular construction of armature ends of the core, but are also provided on the illustrated the armature-shaft (not shown) outer surfaces of the flanges E E, these conpasses through a sleeve 01, forming the hub tinuations of the ribs being lettered g g. of the fixed armature-spiderA, the removable The upper half of Fig. 1 is in section through spider A being slipped over this hub. Bethe ribs g g, while the lower half of this-fig- 5 tween these two spiders a core B is mounted, ure is in section between the ribs, showing the core being held in place and the spiders the ventilating-spaces h h. The arrows indiunited by means of bolts C C, passing through cate the direction of the currents of air which holes 6 e in the spiders and engaging holes or are drawn into the interior of the armature notches in the core. The core B is laminated, through openings 2' t in the spiders and which {CO 50 being made up of punchings of thin sheetpass radially outwardthrough the core-spaces steel in the usual manner, and is peripherally ff and throughthe end ventilating-ducts 7t 7t.

The circulating air thus cools the core and also by flowing around the end portions of the coils or winding cools the latter. The ribs g g are frequent enough to give adequate support to the outlying portions of the winding, so that my mode of ventilation does not detract from the adequate and firm support of the coils, which are bound down onto the flanges by outer bands in the usual manner. The outturned flange E at one end serves to direct the air-currents outwardly. It is preferable to form also ventilating gaps or spaces ff th rough the body of the core, which may readily be done by interposing a series of spacing-pieces F F at intervals, as shown in Fig. 3, to hold apart the core-laminae Within the winding. These spacing-pieces, of which one is shown separately in Fig. 7, are made, preferably, of brass, with radial portions j and connecting-pieces 7t and with flat faces Zlat intervals to seat against the opposite laminze. To prevent the ventilating-spaces being closed by the teeth between the slots containing the windings, the teeth of one lamina may be twisted or turned crosswise, as shown at m in Figs. 4, 5, and 6, which will effectually hold these spaces open.

I claim as my invention the following-defined novel features, substantially as hereinbefore specified, namely:

1. An armature comprising end spiders and an intermediate core and a winding extending across the periphery of the cose and overlying the surface of the spiders, and provided with ventilating air ducts or channels extending outwardly between the spiders and core and then laterally along the spiders beneath the winding, substantially as described.

2. An armature having a laminated core clamped between end spiders, said spiders formed with ribs at intervals in contact with the ends of the core, said ribs extending from the inner part of the core outwardly to the exterior thereof and forming between said ribs ventilating-passages h h through which air may circulate from the interior of the core to the exterior of the armature.

3. An armature having a laminated core clamped between end spiders, having outturned flanges for supporting the outlying portions of the winding, and having ventilating-spaces between said flanges and the winding for cooling the latter.

4. An armature comprising end spiders and an intermediate core, and a winding extending across the core and overlying the surface of the spiders, said spiders having ribs on their inner faces against the core leaving out wardlyextending air-ducts, and having ribs on their outer portions beneath the overlying winding forming laterally-extendingair-ducts communicating with the ouhvardly-extending air-ducts.

5. An armature comprising end spiders and an intermediate core, and a winding extending across the core and overlying the surface of the spiders, and provided with ventilating air-ducts extending outwardly between the spiders and core, and then laterally along the spiders beneath the winding, and an annular flange at the end of one spider for directing the air-currents outwardly.

6. An armature comprising end spidersAA, with a laminated core 13 clamped between them, said spiders formed with outturncd flanges E E, having ribs 9 g on their inner faces against said core, and ribs g g on the outer portions of said flanges, whereby between said ribs are formed ventilating-spaces h 7L for cooling the core and winding.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

JAMES J. \VOOD.

Witnesses:

CHARLES (J. MILLER, FRED S. HUNTING. 

